"Engines" means two (2) Rolls-Royce BR710C4-11 engines bearing manufacturer’s serial numbers 15747 and 15748 together with any and all Parts so long as the same shall be either incorporated or installed in or attached to such Engine. An Engine shall remain leased hereunder whether or not from time to time attached to the Airframe or on the ground.  
"FAA" means the Federal Aviation Administration of the United States Department of Transportation or any successor agency.  
"FARs" means collectively the Aeronautics Regulations of the Federal Aviation Administration and the Department of Transportation, as codified at Title 14, Parts 1 to 399 of the United States Code of Federal Regulations.  
“Flight Crew” has the meaning specified in Section 5.3 of this Agreement.  
"Flight Hour" means each flight hour of use of the Aircraft by Lessee, as recorded on the Aircraft hour meter and measured from the time the Aircraft wheel blocks are removed at the beginning of a flight, to the time the Aircraft wheel blocks are replaced after the Aircraft lands at the end of a flight in one-tenth (1/10th) of an hour increments. Flight Hours also include any flight hours consumed in repositioning the Aircraft to facilitate Lessee’s scheduled itineraries.  
“FSDO Notice” means a FSDO Notification Letter in the form of Schedule B attached hereto.  
"Lien" means any mortgage, security interest, international interest, lease or other charge or encumbrance or claim or right of others, including, without limitation, rights of others under any airframe or engine interchange or pooling agreement.  
"Operating Base" means Westchester County Airport, New York or such other location agreed to by Lessor and Lessee.  
“Original Aircraft” shall have the meaning provided for in the first Whereas clause herein.